Alkanes | Alkenes |
Alkanes are hydrocarbons that consists of only single covalent bond . They can be straight chain or branched chain. General Formula : CnH2n+2 for eg : CH4 ,C2H6 (CH3-CH3), CH3-CH2-CH2-CH3 |
Alkenes are hydrocarbons that contain atleast one double covalent bond that is -C=C-. General formula: CnH2n For eg : CH3-CH=CH2 CH3-CH2-CH=CH2 |
Atria | Ventricles |
These are upper two chambers of heart | These are lower two chambers of heart |
They are less muscular and smaller | They are more muscular and larger |
They have thin walls | They have thick wall |
They receive blood | They pump blood |